Emacs insert series

In Excel you can easily fill in a column with a list of values.
Some times also in Emacs you my need to write down a bunch of similar code.
The dotimes function with the “elsp eval”
M-x : (Esc + : on windooze)
will solve your trouble easily.
Try out this code on scratch buffer:

Also, in a regexp replace you can use the ‘ \, ‘ syntax to push an elisp expression:
For instance enter \,(1+ #1), where , indicates that an elisp form to substitute follows, 1+ is an increment function, and #1 is the first captured match text, interpreted as a number.